What kind of method is being used in VR

Virtual Reality Tools.

'1. Simulation based VR'
Driving simulators gives a driver on board impression that he/she drives an actual vehicle by predicting vehicle motion caused by driver input and feeding back corresponding visual, motion, audio and proprioceptive cues to the driver. The simulator normally consists of several system as follows: a real-time vehicle simulation system performing real-time simulation of vehicle dynamics; motion, visual and audio systems reproducing vehicle motion, driving environment scenes and noise sensed by a driver during driving; a control force roading system acting as an interface between the driver and the simulator; and operator console for monitoring system operation; and system integration managing information and data transfer among subsystems and synchronization. The driving simulators have been used effectively for vehicle system development, safety improvement and human factor study.

'2. Avatar Image based VR'
With this VR, people can join the virtual environment as form of real video as well as an avatar. The proposed image VR system can handle 2-type of users. One can participate in the 3D distributed virtual environment as form of either a conventional avatar or a real video. Background of the video are effectively eliminated to enhance the sense of reality. A user can select his/her own type of participation based on the system capability. Users with capture board and camera may select a video avatar while others select a conventional CG-based avatar. It now provides pretty good interaction environment between human and computer far beyond the conventional desktop computer systems. High-speed network become available with the advance of network technologies.

3. Projector based VR
Modeling of real environment plays a vital role in various virtual reality applications, such as robot navigation, construction modeling and airplane simulation. Image based virtual reality system is gaining popularity in computer graphics as well as computer vision communities. The reason is that is provides more realism by using photo realistic image and the modeling procedure is rather simple. In generating realistic models, it is essential to accurately register acquired 3D data. Usually, camera is used for modeling small objects at a short distance.

'4. Desk top based VR'
It is the use of animated interactive 3D graphic to build virtual world with desk top display and without head tracking. It is important to be clear about the meaning of the term immersion. Webster defines it as “the state of being absorbed or deeply involved.” Clearly, immersion can occur while we are playing video game (many of which are examples of Desk top VR) Experience suggest that proper3D cues and interactive animation aid immersion can draw the user into the 3D world. In other word, immersion should not be equated with the use of head-mounted display: mental and emotional immersion does take place, independent of visual or perceptual immersion. A common criticism of Desk top VR focuses on the lack of peripheral vision afforded by a desk top display, claiming that user are not aware of their surroundings or of their location in the virtual space.